Improvement in friction-rollers



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WILLIAM BROWN, OF PORTSMOUTH, ENGLAND.

Letters Patent No. 109,866, dated December 6, 1870.

IMPROVEMENT IN FRlCTlONi-ROLLERS.

The Schedule referred to inlthese Letters Patent and making part of the same.

To all whom yit may concern:

Be it known that Lwnmnm BROWN, of Iorrsmouth, in the county of Southampton, England, have invented Improvements in the Construction of Thrust-Blocks, Plummer-Blocks, and such like mechanism, used in steam-ships, the said improvements being applicable to all kinds of screw and lifting-jacks, and for the bearings of cranes, mill-shafts, and suoli like machinery, and I do Ahereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon.

7 Io enable others skilled in the art to make and use iny invention, I will proceed to describe its construction and operation.

This invention relates, in the first instance, to the shafts of screw-propellers used in vessels, and is designed .to reduce and considerably lessen the extreme friction and heating of the parts employed to take the thrust of the screw when in action.

I propose to remedy thel above objections by the following means, that is to say, instead of employing collars on the shaft, embraced at opposite points by grooved recesses formed in strong thrust or plummerblocks, and making the saidrecesses each of corresponding size to the said collars, I propose, instead of such said recesses, to adapt small rollers to the said thrust or pllnnmer-blocks at each side of each of the aforesaid collars ou the driving-shaft, so that in- -stead of the said collars revolving against the fixed veconomizing a great saving of lubricating material,

and also dispensing with the necessity for eml'lloyingr v water, as now practiced in large screw vessels, for keeping the rubbing surfaces cool, and also a donkey e11- gine for discharging the bilge-watcr occasioned 'by the use of water for that purpose.

The foregoing arrangement applies also to all kinds of screw and lifting-jacks, and for the bearings of cranes, mill-shafts, and other similar machinery employed to support heavy moving bodies.

.Description of the Drawing.

Figure l represents a side elevation of astln'ustblock adapted for the shafts of screw-propellers.

Figure 2, au elevation thereof.

Figure 3, a horizontal plan on the lino A B at tiff. l.

Figure 4, a front elevation of the thrust-block or one-half thereof.

Figure 5 represents a transverse and vertical section of a screw-jack, showing this invention Vadapted thereto.

At each of the above figures similar letters of reference arc employed to denote corresponding parts.

As regards figs. 1, 2, 3, 4-

A marks a strong metal shoe.

B, the thrust-blocks for carrying the shaft C, on

one end of which a screw-propeller is to be fixed.

The blocks B have each a circular channel or recess at a a formed therein, in which is placed loosely, side by side, a series of conical-shaped rollers b b, which come into contact with the beveled faces c o of a collar, D, formed on-thesllaft O.

E are strong pins and keys for securely connecting the t-lnust-blocks B B together at the top thereof.

G, holes for bolts for fixing the bottom of the blocks B in the shoe A.

I-I are holes for fixing the shoe A to a ships bottom.

The rollers b may be made of any metal, but I prefer that they should be made of a ditferent met-al t'o that of which the blocks B are made; for example, suppose the blocks to be of cast-iron, the rollers may be of wrought-iron, steel, or gun-metal, and this -applies to the parts shown at iig.

lVhat I claim as lnyinvention, and desire .to securel by'Letters latent, is

1. The collar D, provided with beveled faces o c upon the shaft (l, in combination with a series of tapering rollers playing between the beveledv faces of the collar and the thrust-blocks, substantially as described, for the purpose set forth.

2. lhc conical .rollers 7) l', arranged within the recess or channel of the thrust-blocks, and bearing against the beveled faces o c'ot' the colla-1' C upon the 'sl-iaft D, said shaft'having its bearings upon the thrust-blocks B B, the whole combined, arranged, and operating snbstantiall y as herein shown and described.

rI he thrust-blocks B, secured together by pins and keys, and mounted upon a shoe, A, as described, in combination with the collar D, formed with beveled faces o c, and secured upon the shaft C with a 

